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在阿尔茨海默病的App敲入小鼠模型中,PDE4B亚型特定抑制的保护作用

Paul Armstrong¹, Hüseyin Güngör^2,3, Pariya Anongjanya¹

¹School of Biomedical Sciences, University of Leeds, LS2 9JT, Leeds, UK.

Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology

|March 24, 2024

概括

向基化酶B4 (PDE4B) 在阿尔茨海默病小鼠模型中预防了认知和代谢缺陷. 这表明PDE4B是阿尔茨海默病的关键调节器和潜在的治疗点.

科学领域:

神经科学是一个神经科学.
遗传学遗传学是一个
药理学药理学是指药理学的学科.

背景情况:

全基因组关联研究表明,基酶B (PDE4B) 在阿尔茨海默氏症 (AD) 发病过程中.
PDE4B是一种循环腺单酸盐 (cAMP) 特定的固酶.
了解PDE4B在AD中的作用对于开发向疗法至关重要.

研究的目的:

用小鼠模型研究PDE4B在AD相关表型中的作用.
评估减少PDE4B活动对空间记忆,大脑新陈代谢和粉样蛋白病理学的影响.

主要方法:

使用了 AD. 的 App NL-G-F 敲入鼠标模型.
使用巴恩斯迷宫测试评估空间记忆.
通过C-2-脱氧葡萄糖自发放射学测量大脑代谢.
量化β-粉样蛋白 (Aβ) 斑块使用thioflavin-S染色.
在大脑皮层组织中分析了炎症标志物和基因表达 (RNA测序).

主要成果:

12个月的NL-G-F小鼠表现出空间记忆和大脑新陈代谢缺陷.
在App^NL-G-F/Pde4b^Y358C小鼠中,这些缺陷被防止了,它们的PDE4B活性降低了,而没有改变Aβ斑块负载.
RNA测序确定了13种差异表达的转录,可能调解PDE4B的保护作用.

结论:

在临床前的AD模型中,向抑制PDE4B可以防止空间记忆和大脑葡萄糖代谢缺陷.
这项研究在AD模型中证明了PDE4B亚型特定抑制的第一个保护作用.
已确定PDE4B是AD表现的关键调节者,也是一个有前途的治疗标.

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